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Share Repurchase Activity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Nov. 01, 2014	Oct. 31, 2015	Nov. 01, 2014
Disclosure Share Repurchase Activity [Abstract]
Number of shares repurchased	6.2	11.4	21.8	26.0
Total cost	$ 200	$ 433	$ 807	$ 1,016
Average per share cost including commissions (in dollars per share)	$ 32.17	$ 37.95	$ 36.93	$ 39.15

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- Definition

Disclosure - Share Repurchase Activity [Abstract]

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 505



-SubTopic 30



-Section 45



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Number of shares that have been repurchased during the period and are being held in treasury.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



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-SubTopic 10



-Section 50



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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the par value method.

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